He played 13 matches in less than 20 days in South America, travelled to Slovakia and if he wants to be perfect for big clay events (he missed French Open last two years due to injury) he must take a break some day. It´s called smart decision

Clay is his favorite, obviously.
But is it smart to concentrate too much of his effort on one surface
when he's this young and has lots of potential to improve his game
on other surfaces as well? (At least, to me, he does.)
If he IS indeed resting himself up for the clay season like Deivid has mentioned,
that, to me, looks like a move that should be made by other veteran clay courters.

Well it´s pretty obvious Nadal doesn´t want to miss French Open for third time in a row so it´s a logical thing what he has decided. Those who bash him maybe in some years will change their nicks for sth like Rafiman

Seeing as he's playing immediately following Miami (where he has points to defend), because he's trying to get his ranking up by playing smaller events (and he is NOT a top player, so this is a perfectly reasonable tactic), this was a smart choice. The stupid choice would have been getting his foot broken again, which is apparently what some people would like to see

One can argue that he shouldn't have stayed in South America for so long. I say that he went down there ranked near 50 and left ranked around 30. Sounds like that was a pretty smart decision to me.

If he's still doing this when he's ranked 10 in the world I will be happy to criticize him.